Surgical drill bit



FIG. 1 is a perspective view of the design of a surgical drill bit;

FIG. 2 is a back plan view of the surgical drill bit shown in FIG. 1;

FIG. 3 is a front plan view of the surgical drill bit shown in FIG. 1;

FIG. 4 is a top side view of the surgical drill bit shown in FIG. 1;

FIG. 5 is a bottom side view of the surgical drill bit shown in FIG. 1;

FIG. 6 is a right side view of the surgical drill bit shown in FIG. 1; and,

FIG. 7 is a left side view of the surgical drill bit shown in FIG. 1.

The dot-dash broken lines represent boundaries of the design and form no part of the claimed design. 

CLAIM The ornamental design for a surgical drill bit, as shown and described. 